Well since people requested it (including me) and it hasn't been done yet, I decided to separate the Half-Life achievements by game myself using Pyroman's guide. It will be more than one post. Hope this helps, and if I screwed up or if something needs to be added, let me know. I am not taking credit for these, just putting them in an order that seems better. If not let me know. Good job with the guide Pyro.

These are not necessarily chronological, but separated by what you see in the start menu (includes secret achievements).

Half-Life 2 Achievements:

Defiant5 Hit the trashcan cop with the can.

Just like submissive but just a little different. At the beginning of the game after talking to barney you will meet a combine soldier blocking your way and wanting you to pick a can that he knocked on the floor. Just pick up the can and throw it at him instead of throwing it in the trash.

Submissive5 Put the can in the trash.

At the beginning of the game after talking to barney you will meet a combine soldier blocking your way and wanting you to pick a can that he knocked on the floor. Just pick it up and drop it into the trash.

Malcontent5 Escape the apartment block raid.

Near the beginning of the game, you jump out of the window after talking to Barney and then you should get this one.

What Cat?5 Break the mini-teleporter in Kleiner's lab.

When you first enter his lab, the mini-teleporter is on the left with the plant inside it. Just keep making it go back and forth and eventually it will break and you will get this.

Trusty Hardware5 Get the crowbar.

This will unlock once you receive the crowbar. Also works in Ep1 and Ep2.

Barnacle Bowling5 Kill five barnacles with one barrel.

Easily done in the Chapter called Route Kanal. Awhile into the chapter you will come to a guy on a turret, take him out and follow the path into the muddy tunnel ahead. Once in there you will soon come to a tunnel with MANY barnacles in one spot and a explosive barrel right next to you. Simply shoot the barrel until it's on fire, then make it roll down into their line things and it will bring it up and it will soon explode.

Anchor's Aweigh!5 Get the airboat.

Story related so you can't miss it. Once you jump into the airboat in the end of Route Kanal, you will get it.

Heavy Weapons5 Get the airboat's mounted gun.

Also story related, you will get this attached to the airboat in the chapter called Water Hazard.

Here is a nice video showing the exact location of this guy in the very end of Water Hazard. But instead of using a modded weapon(like he did), just park the airboat under it and climb on it and jump up.

At the end of Water Hazard, there will be a little battle with a chopper circling around. Just keep shooting it with the airboat's machine gun and avoid the little bombs. When it finally blows up, you will get this one.

Blast from the Past10Find the HEV Suit Charger faceplate in Eli's scrapyard.

When you first enter the scrapyard, look to your left. You will see a little ledge above you with a couple barrels on it. Just stack boxes with the gravity gun and when you get up there, you must pick it up with the Gravity Gun to get the achievement.

Zero-Point Energy5 Get the Gravity Gun in Black Mesa East.

As soon as you get the Gravity Gun handed to you from Alyx, you will get this achievement.

Two Points2 Use DOG's ball to make a basket in Eli's scrapyard.

When playing catch with DOG, it will throw the ball at you. Just look up to the right and you will see the hoop. Just keep shooting 'til goes in. You should get the achievement right after that.

Bone Breaker5 Kill 30 enemies with thrown physics objects.

Very easily done in Ravenholm, just pick up anything with the gravity gun and shoot it at enemies. It must kill them, not stun them. You will get little popups along the way(10/30 and 20/30).

Hack Attack!5 Kill five enemies with a Manhack.

After recieving the Gravity Gun, you will be able to use man hackers to your ability. Just pull them in and shoot them at an enemy to kill them.

Zombie Chopper25 Play through Ravenholm using only the Gravity Gun.

Might sound alittle tough but it's not all that hard. Just keep finding saw blades, barrels, boxes, and anything else to pick up and shoot at enemies. If you stuck on a rooftop with no items to pickup and are being chased by enemies, just run from them...You can pull out other weapons but you just can't hit the Right Trigger. Even if you swing the crowbar to open boxes it will count as using another weapon.

Hallowed Ground5 Escort Gregori safely through the church cemetery.

Story related so you can't miss it.

Hot PotatOwned10 Kill a Combine soldier with his own grenade.

When you get out of the tunnels of Ravenholm, you will come to train tracks guarded by snipers. Once you get past this, there will be a few guys, wait alittle bit and they will lob a grenade at you, pick it up with the Gravity Gun and shoot it back at their feet and viola!

OSHA Violation5Kill 3 enemies using the crane.

In the chapter, Highway 17, you will come to a magnetic crane in which you need to pick up the buggy and place it on the higher level. When you get into the crane, 3 guys will come out from the building and start shooting you. Just pick up a huge container, and start swinging it at them. You can also drop it on them to kill them as well.

Targetted Advertising5 Pin a soldier to the billboard in chapter Highway 17.

Just before you cross the bridge to that farm with many foes, there is a big car pile up. If you look next to it, there is a hill with a tree on it. Get up the hill and there should be a corpse with the crossbow. The player should still be able to stick that guy from the hill provided they aim slightly above the target.

Where Cubbage Fears to Tread5 Defend Little Odessa from the gunship attack.

These ships are easier taken out by Rockets. It takes about 4-5 rockets to take one down. You have the entire game to do this so you should get it eventually. Once you kill any of them, a little popup will show your progress(1/6, 2/6, etc.)

Keep off the Sand!20 Cross the antlion beach in chapter Sandtraps without touching the sand.

Sorta difficult. When you come to the beach where you have to cross the sand that is infested with Antlions, find anything of use and use the gravity gun to make your own little pathway across the sand. If you happen to mess up, just reload an autosave and start again. The achievement will unlock, if done right, as you are on the hill RIGHT before the little battle with the Antlion Guard.

Bug Hunt10 Use the antlions to kill 50 enemies.

In the chapter, Sandtrap, you will get Bugbait grenades. Just throw them on enemies and watch the antlions kill away.

Flushed5 Kill an enemy with a toilet.

In the chapter, Nova Prospekts, there should be toilets in some of the cells so just pick it up with your trusty gravity gun and fire it at an enemy.

You can easily find these guys from the blue laser their gun emites. Just kill them anyway possible. This is pretty much story related. Just lob a grenade in the windows.

Think Fast!10 Kill an Elite Soldier with his own energy ball.

Exactly like Hot PotatOwned achievement but in a different location.

Follow Freeman10Gain command of a squad of rebels in the uprising.

In the chapter Anticitizen One, you'll begin to gain controll of rebels for your squad. You should have a total of 4 when you meet up with the group that pulls down the monitor and that's when it unlocks.

Deadly Harvest5 Kill an enemy by planting a hopper mine.

Easily gotten in the chapter, Anticitizen One. There are a few hoppers that you can set up before the first wave of enemies come at you. Just set them up at one or both ends where the force fields are at.

"Radiation Levels Detected"5 Get through the toxic tunnel under City 17 in Half-Life 2.

Story related so you can't miss it.

Conservationist5 Kill five enemies with the same energy ball.

This applies to those energy balls floating for generators. Very easy when working your way into the Citadel. Pull one in, shoot it to kill an enemy, then pull it back, rinse and repeat till 5 are down.

Fight the Power5 Shut down the supression device by disabling its generators.

Story related so you can't miss it

Giant Killer10 Survive the rooftop strider battle in the ruins of City 17.

Story related so you can't miss it.

Atomizer10Disintegrate 15 soldiers by throwing them into a Combine ball field.

In the end of Half-Life 2, after you have entered the citadel and you lose all of your weapons except your gravity gun that will turn blue. You can now pick up soldiers and throw them into the ball generators. Do it 15 times and there you go.

In Episode 1 or 2, there will be zombies who used to be Combine soldiers. When they pull out a grenade, just use the gravity gun to take it away from them.

Zombie-que5 Use flares to light 15 zombies on fire.

Easiest place is in the parking garage in Episode 1, right around when the lights go out waiting for the elevator. Plenty of zombies, a good few flares. The flares are usually lying on the ground. When you pick them up they will light automatically.

Watch Your Head!5 Make it to the bottom of the Citadel's main elevator shaft in one piece.

Story related so you can't miss it.

Containment5Contain the Citadel core.

Story related so you can't miss it.

Pacifist10 Contain the Citadel core without killing any stalkers.

The stalkers that you can't kill are the two that are below the core. They are the bony skinny looking guys. Just don't kill them and shoot the energy balls in the opener things. Be quick because these guys disable them right after. When the core is contained and your gravity gun goes back to its original self, the achievement will unlock.

Car Crusher5Use the cars to squash 15 antlions in Episode One.

When the antlions are coming up from those holes, you have to plug them up by putting a car over it with the gravgun. Just keep pushing the car into antlions with the gravgun. You should get updates too(5/15 and 10/15).

Elevator Action10 Survive long enough to get on the parking garage elevator.

Story related so you can't miss it.

Live Bait10 Help Alyx snipe 30 enemies in Episode One.

After you kill the sniper in episode one, Alyx climbs up and gets it to back you up. Just run through the next part with only the gravity gun pushing the enemies into her path until she kills 30.

Attica!5 Destroy the gunship in the hospital attic.

Story related so you can't miss it.

Citizen Escort15Don't let any citizens die when escorting them to the escape train.

Just try and take all the bullets that are fired at them and shoot back. Not quite that hard but will be a burden when one dies and you have to start over.

Escape from City 1720Escape City 17 with Alyx.

Story related so you can't miss it.

The One Free Bullet40Beat Episode One firing exactly one bullet. Grenade, crowbar, rocket, and Gravgun kills are okay!

Save the bullet for a lock later in the game. There is a lock that you need to break and shooting it is the only way. The lock is in the room you get pistol and shotgun on the "Lowlife" level on Episode One.

These are the guys that shoot the acid at you. Just kill one and you will get it right after that.

Get Some Grub20Squish every antlion grub in Episode Two.

Just find all these little guys and shoot or smash them. There is about 333 of these guys so look in every nook or cranny or lockers. They make a buzzing noise if there is one near by. There are 93 Antlion Grubs in Chapter 1 and 240 Antlion Grubs in Chapter 2. We aren't going to list them all but here are what totals you should have.

-when you get to the vortigaunt saving alyx i had 93 grubs

-when you get to the weighted elevator i had 142 grubs

-when you get to the elevator with the thumper i had 226 grubs

-when you get to the acid-lion guard (where the guard is first able to kill you) i had 263

The last grub is after the vortigaunts heal alyx.

Pinata Party5 Find and break every web cache in Episode Two.

1. after entering the tunnels and coming to the first water hole it will be under water. before getting to the vortigaunt that is saving alyx.

2. right after leaving the vortigaunts that are saving alyx and going into the tunnel with the main vortigaunt to get the extract. it will be on the wall.

3&4. after fighting the first wave of acid-lions there will be one and after fighting a second wave of acid-lions there will be another.

5. later on down the same tunnel there will be a weapons cashe above head.

6,7,8&9. will all be in the elevator room were you need to attach the gear (two above head and two on the walls)

Into the Breach5Help Griggs and Sheckley hold off the antlion invasion inside the mine shaft.

Story related so you can't miss it.

Twofer5 Defeat both antlion guards outside the White Forest.

Story related so you can't miss it.

Hit and Run5 Run over 20 enemies with the car in Episode Two.

When you get the car, just keep running over as much enemies as possible. You should get this in no time.

Meet the Hunters10 Survive the Hunter ambush with Alyx.

Story related so you can't miss it.

Payback10Kill a Hunter with its own flechettes.

When a hunter is attacking you you should notice that it shots these little darts that blow up just use your gravity gun to pick up a box or another object. The hunter will shoot the boxes then throw the box at it and if it dies you should have the achievement.

Puttin' on a Clinic15Defeat the chopper in Episode Two without any misses.

In the Chapter titled "Under the Radar", after your car breaks down, you will have to take down the chopper. When it drops the little bombs, pick it up with the gravgun and shoot it at the chopper. It will take 4-5 of these. If you miss just reload an autosave.

Gunishment!5Destroy the Combine cannon in the junkyard.

Story related so you can't miss it.

Cache Checker10 Find every radar cache in chapter Under The Radar.

1.After getting back your car from the mechanic. drive through the slug then turn left. it will be in the van with a car wedge up on it.

2.After passing a water tower on the left hand side you will come to a building with a van that has run into the side of a building. go into the bluiding and there will be a legde you can not get to pull the big piece of metal leaving on it onto the floor then throw a grende under it the launch you up to the legde to flip switch.(you should also recieve the "Gordon Propelled Rocket" achievement)

3.Drive straight across the road into the boxcar yard and you will see a shed missing part of its roof in the back. go inside and you will see a saw blade in the floor pull it up to uncover the cashe.

4.After going through the tunnel and going up a curve hill there will be a tree log to your left. go behind it and there will be a small cave. go inside and there's your 4th cashe.

5.Afer fighting off the combine and powering down the fence to free your car. you will jump off a ramp and drive down another curve hill it will be on your right side behind some rocks. there will be an arrow pointing up. there are some rocks there to break the rope that has the cashe hanging on the tree. (i used the secondary fire on my smg to get it down)

After passing a water tower on the left hand side you will come to a building with a van that has run into the side of a building. go into the bluiding and there will be a legde you can not get to pull the big piece of metal leaving on it onto the floor then throw a grende under it the launch you up to the legde to flip switch.

Quiet Mountain Getaway10 Survive the ambush at White Forest Inn.

Story related so you can't miss it.

Petal to the Metal5 Beat DOG in a race to the White Forest base.

Little harder if you are trying to get the gnome to the rocket. The gnome doesn't like to stay in the car if you are going fast...

Little Rocket Man30Send the garden gnome into space.

In Episode Two, find the Gnome in the communications shack in the begining of the game. He is hidden under a shelf. Keep the gnome with you until you get to the White Forrest Base and place it in the rocket with Lamarr. You must close the door after you place the Gnome inside the Rocket with Lamarr. The achievement will unlock once the door is closed.

Props for sorting the guide out! Anyways, how can I easily get the Conservationist achievement? I try but its very hard. MAybe i might be doing it wrong.

This one was a matter of luck for me, but I thought about where it might be easily possible, where a large group of combines come out together, and I knew in the last part of the game, when Breen is in that ball thing. At then end of the game in the chapter "Dark Energy", when Breen is trying to escape, simply get up to the part where there are three energy ball fields separated by panes of glass, take out one of the balls and then turn around and look back at the hallway entrance to your left once you have turned around. From this hallway, there will be a group of 7-6 combines, make sure to shoot it as soon as you see the first one, because they spread out more as they move.

__________________I have moved to PC gaming, so I
won't be on Xbox LIVE anymore.

I got the Conservationist achievement on the rooftop after you kill the last gunship (unlocked the One Man Army achievement then) where the enemy lands in a dropship then drops the bridge across. If you cross the bridge some guys will swarm out and I used the alternate fire on the alien assault rifle to kill them. I had to try it a few times but I did get it there. Probably not the easiest place to get it as others have pointed out.

Great work on organizing the guide.

I had a hell of a time getting the 2 point shot achievement. The ball went through the hoop but for some reason it wasn't counting it. When you get it you will see a green light go off on the backboard. I backed up about 4/5th of the way to the wall and shot. Had to try it like 30 times.

I haven't opened my copy of the game yet, just because I wanted to find something like this - looks great!

A few questions however (please answer):

1. Are they also in order of when you have to look out for them / will receive them? I mean the episode ordering is a decent bit of help, but if I have to keep my eye on each achievement for that episode anyway, it would get confusing.

2. Can you put the ones that you have to look out for for the entire game at the very beginning (such as collectibles)?

3. How long is episode one? I want to do it for fun the first time, using bullets then another time for that last achievement.

is it even possible to "throw" items on the 360 version? i don't think there's a button for that. maybe i completely missed it.

I think you're right. Are you asking regarding the Defiant achievement specifically? I think it just depends on whether you aim at the guard or the trash can then hit release. If you're looking at the guard it throws the can. I could be wrong though since it's been awhile since I did that part.

Hey guys,I have a question.....is the Counter-Sniper achievement unlocked when you kill the snipers that are keeping barney holed up in the broken down warehouse?Because if so,I never got "Counter-Sniper"....(and I finished HL2 the other night)

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You sir, have been owned. Locking this down to prevent more people from completely tearing your argument apart